Re: [BACKPORT PATCH] nvme-pci: Remap CMB SQ entries on every controller reset

[Greg KH <gregkh@linuxfoundation.org>]

On Thu, Jul 12, 2018 at 03:27:17PM -0600, Scott Bauer wrote:
> Commit 815c6704bf9f1c59f3a6be380a4032b9c57b12f1 upstream.
> 
> The controller memory buffer is remapped into a kernel address on each
> reset, but the driver was setting the submission queue base address
> only on the very first queue creation. The remapped address is likely to
> change after a reset, so accessing the old address will hit a kernel bug.
> 
> This patch fixes that by setting the queue's CMB base address each time
> the queue is created.
> 
> Fixes: f63572dff1421 ("nvme: unmap CMB and remove sysfs file in reset path")
> Reported-by: Christian Black <christian.d.black@intel.com>
> Cc: Jon Derrick <jonathan.derrick@intel.com>
> Signed-off-by: Keith Busch <keith.busch@intel.com>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Signed-off-by: Scott Bauer <scott.bauer@intel.com>
> Reviewed-by: Jon Derrick <jonathan.derrick@intel.com>
> ---
>  drivers/nvme/host/pci.c | 27 ++++++++++++++++-----------
>  1 file changed, 16 insertions(+), 11 deletions(-)

"backport" to where?  What kernel tree(s) do you want this applied to?

I need a hint please...

thanks,

greg k-h